/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Copyright (C) 2011-2025 OpenFOAM Foundation
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.

    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.

Class
    Foam::ITstream

Description
    Input token stream.

SourceFiles
    ITstream.C

See also
    Foam::OTstream

\*---------------------------------------------------------------------------*/

#ifndef ITstream_H
#define ITstream_H

#include "Istream.H"
#include "tokenList.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{

/*---------------------------------------------------------------------------*\
                          Class ITstream Declaration
\*---------------------------------------------------------------------------*/

class ITstream
:
    public Istream,
    public tokenList
{
    // Private Data

        //- Name of ITstream
        fileName name_;

        //- Index of token currently being read
        label tokenIndex_;


public:

    // Constructors

        //- Construct from components
        ITstream
        (
            const string& name,
            const streamFormat format = ASCII,
            const versionNumber version = currentVersion,
            const bool global = false
        )
        :
            Istream(format, version, UNCOMPRESSED, global),
            name_(name),
            tokenIndex_(0)
        {
            setOpened();
            setGood();
        }

        //- Construct from components and token
        ITstream
        (
            const string& name,
            const token& t,
            const streamFormat format = ASCII,
            const versionNumber version = currentVersion,
            const bool global = false
        )
        :
            Istream(format, version, UNCOMPRESSED, global),
            tokenList(1, t),
            name_(name),
            tokenIndex_(0)
        {
            setOpened();
            setGood();
        }

        //- Construct from components and token list
        ITstream
        (
            const string& name,
            const UList<token>& tokens,
            const streamFormat format = ASCII,
            const versionNumber version = currentVersion,
            const bool global = false
        )
        :
            Istream(format, version, UNCOMPRESSED, global),
            tokenList(tokens),
            name_(name),
            tokenIndex_(0)
        {
            setOpened();
            setGood();
        }


        //- Move construct from components, transferring the token list
        ITstream
        (
            const string& name,
            List<token>&& tokens,
            const streamFormat format = ASCII,
            const versionNumber version = currentVersion,
            const bool global = false
        )
        :
            Istream(format, version, UNCOMPRESSED, global),
            tokenList(move(tokens)),
            name_(name),
            tokenIndex_(0)
        {
            setOpened();
            setGood();
        }


        //- Copy constructor
        ITstream(const ITstream& its)
        :
            Istream(ASCII, currentVersion),
            tokenList(its),
            name_(its.name_),
            tokenIndex_(0)
        {
            setOpened();
            setGood();
        }


        //- Destructor
        virtual ~ITstream()
        {}


    // Member Functions

        // Inquiry

            //- Return the name of the stream
            const fileName& name() const
            {
                return name_;
            }

            //- Return non-const access to the name of the stream
            fileName& name()
            {
                return name_;
            }

            //- Return the current token index
            label tokenIndex() const
            {
                return tokenIndex_;
            }

            //- Return non-const access to the current token index
            label& tokenIndex()
            {
                return tokenIndex_;
            }

            //- Return the number of remaining tokens
            label nRemainingTokens() const
            {
                return size() - tokenIndex_;
            }

            //- Return flags of output stream
            ios_base::fmtflags flags() const
            {
                return ios_base::fmtflags(0);
            }


        // Read functions

            //- Return next token from stream
            virtual Istream& read(token&);

            //- Read a character
            virtual Istream& read(char&);

            //- Read a word
            virtual Istream& read(word&);

            // Read a string (including enclosing double-quotes)
            virtual Istream& read(string&);

            //- Read an int32_t
            virtual Istream& read(int32_t&);

            //- Read an int64_t
            virtual Istream& read(int64_t&);

            //- Read a uint32_t
            virtual Istream& read(uint32_t&);

            //- Read a uint64_t
            virtual Istream& read(uint64_t&);

            //- Read a floatScalar
            virtual Istream& read(floatScalar&);

            //- Read a doubleScalar
            virtual Istream& read(doubleScalar&);

            //- Read a longDoubleScalar
            virtual Istream& read(longDoubleScalar&);

            //- Read binary block
            virtual Istream& read(char*, std::streamsize);

            //- Rewind and return the stream so that it may be read again
            virtual Istream& rewind();


        // Edit

            //- Set flags of stream
            ios_base::fmtflags flags(const ios_base::fmtflags)
            {
                return ios_base::fmtflags(0);
            }


        // Print

            //- Print description of IOstream to Ostream
            void print(Ostream&) const;


    // Member Operators

        //- Assignment operator
        void operator=(const ITstream& its)
        {
            Istream::operator=(its);
            tokenList::operator=(its);
            name_ = its.name_;
            tokenIndex_ = 0;

            setOpened();
            setGood();
        }
};


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace Foam

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#endif

// ************************************************************************* //
